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System of Measurement
Inch
Metric
Length
3/8"
1/2"
5/8"
3/4"
7/8"
1"
1
1/4"
1
1/2"
1
5/8"
1
3/4"
2"
2
1/4"
2
1/2"
2
3/4"
3"
3
1/4"
3
1/2"
3
3/4"
Thread Size
8-32
10-24
10-32
1/4"
-20
5/16"
-18
3/8"
-16
7/16"
-14
1/2"
-13
5/8"
-11
3/4"
-10
7/8"
-9
M5
M6
M8
M10
M12
M16
M20
Screw Size
1/4"
5/16"
3/8"
1/2"
5/8"
3/4"
M5
M6
M8
M10
M12
M16
Material
Silicon Bronze
Stainless Steel
Steel
Fastener Head Type
Flanged
Hex
Rounded
Threading
Fully Threaded
Partially Threaded
Finish
Black Oxide
Black Zinc Plated
Hot-Dipped Galvanized
Zinc Flake Coated
Zinc Plated
Zinc Yellow-Chromate Plated
Neck Type
Knurled
Square
Fastener Strength Grade/Class
Class 8.8
SAE Grade 2
SAE Grade 5
SAE Grade 8
Head Height
0.059"
0.114"
0.145"
0.172"
0.176"
0.208"
0.21"
0.219"
0.239"
0.25"
0.27"
0.275"
0.28"
0.32"
0.344"
0.39"
0.406"
0.422"
0.459"
0.5"
3.3 mm
3.5 mm
3.6 mm
3.8 mm
3.88 mm
4 mm
4.8 mm
4.88 mm
5.38 mm
5.5 mm
5.8 mm
6.8 mm
6.95 mm
7 mm
8 mm
8.9 mm
8.95 mm
10 mm
10.9 mm
Head Diameter
0.303"
0.469"
0.594"
0.719"
0.844"
0.969"
1.094"
1.344"
1.594"
1.844"
13.55 mm
14.2 mm
16.55 mm
18 mm
20.65 mm
22.3 mm
24.65 mm
26.6 mm
30.65 mm
35 mm
38.8 mm
43 mm
Thread Pitch
0.8 mm
1 mm
1.25 mm
1.5 mm
1.75 mm
2 mm
2.2 mm
2.5 mm
2.6 mm
3.6 mm
4.5 mm
5 mm
6 mm
Specifications Met
ASME Standard
ASTM Standard
DIN Standard
ISO 8678
SAE J429
Neck Width
0.16"
0.2"
0.26"
0.32"
0.33"
0.39"
0.45"
0.52"
0.64"
0.77"
0.9"
5.48 mm
6.48 mm
8.58 mm
10.58 mm
12.7 mm
16.7 mm
20.84 mm
Head Width
0.313"
0.375"
0.438"
0.5"
0.563"
0.75"
0.938"
1.125"
8 mm
10 mm
13 mm
17 mm
19 mm
24 mm
Thread Length
3/8"
7/16"
1/2"
5/8"
0.667"
3/4"
0.833"
0.854"
7/8"
0.885"
1"
1.122"
1
1/8"
1.167"
1
1/4"
1.28"
1.333"
1
3/8"
Thread Type
Metric
UNC
UNF
REACH
Compliant
Not Compliant
RoHS
Compliant
Not Compliant
U.S.–Mexico–Canada Agreement (USMCA) Qualifying
Yes
No
DFARS Specialty Metals
Exempt
Not Compliant
Export Control Classification Number (ECCN)
EAR99
Thread Spacing
Coarse
Fine
Neck Length
0.11"
0.13"
0.16"
0.19"
0.22"
1/4"
0.28"
0.34"
0.41"
0.44"
0.47"
0.63"
3 mm
4 mm
4.1 mm
4.6 mm
5 mm
5.6 mm
6.6 mm
8.7 mm
12.9 mm
Tensile Strength
60,000 psi
70,000 psi
110,000 psi
120,000 psi
150,000 psi
Not Rated
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